{"id":78024,"date":"2025-03-05T12:15:07","date_gmt":"2025-03-05T06:45:07","guid":{"rendered":"http:\/\/198.58.113.91\/blog\/?p=78024"},"modified":"2026-03-09T12:16:02","modified_gmt":"2026-03-09T06:46:02","slug":"resize-efi-system-partition","status":"publish","type":"post","link":"https:\/\/www.winhelponline.com\/blog\/resize-efi-system-partition\/","title":{"rendered":"How to Resize the EFI System Partition in Windows"},"content":{"rendered":"

Summary: This post explains how to increase the size of the EFI partition to 250 MB without using any paid software.<\/em><\/p>\n

The EFI system partition stores the boot configuration database (BCD) and the boot files needed to boot a UEFI system. By default, the Windows setup creates a 100 MB EFI partition, which may be insufficient sometimes. <\/p>\n

\"resize<\/p>\n

OEMs dump the BIOS update images into the EFI partition, thus consuming the entire space in that volume. If the EFI partition is full, Windows updates will roll back with the error code 0x800F0922<\/a>, and Feature updates will fail with the\u00a0error code 0xc1900201<\/a> or the error message “Failed to upgrade the system reserve partition.”<\/p>\n

As mentioned in the above articles, you can delete the font files (.ttf) and BIOS update images from the EFI partition whenever it becomes full. However, that’s only a workaround. A permanent fix is to resize the EFI partition to 200 MB or more. The built-in Disk Management console doesn’t help because it doesn’t let you extend a partition if the free space is not adjacent to that partition.<\/p>\n

AOMEI Partition Assistant Standard (free) can resize the EFI partition easily.<\/p>\n

\n\"warningImportant:<\/strong> Before proceeding, please backup<\/strong> your data to an external drive. Although the following procedure shouldn’t erase your data, it’s highly advisable to backup the disk before modifying its layout.\n<\/div>\n

Resize the EFI System Partition<\/h2>\n

(This article assumes that your OS disk has the default UEFI layout — i.e., EFI, MSR, OS partition, and the Recovery partition)<\/p>\n

Please follow these steps to extend the EFI partition.<\/p>\n

Download AOMEI Partition Assistant Standard and install it.<\/p>\n

https:\/\/www.aomeitech.com\/pa\/standard.html<\/pre>\n
Select the C drive, and click “Resize\/Move Partition.”<\/p>\n
\"resize<\/p>\n
In the “Move and Resize Partition” dialog, enable “I need to move this partition<\/strong>“. You should now see the drag handles on both sides of the partition.<\/p>\n
Also, click the right arrows next to the “Partition size” text box.<\/p>\n
\"resize<\/p>\n
Configure the options as below — i.e., approximately 150 MB<\/span> of unallocated space before<\/span><\/strong> the partition, and click OK.<\/p>\n
\"resize<\/p>\n
You’ve created an unallocated space before the C drive (i.e., after the Microsoft Reserved partition.)<\/p>\n
\"resize<\/p>\n
You should now move the Microsoft Reserved (MSR) partition to the right of the unallocated space.<\/p>\n
To do so, select the 16 MB MSR partition and click “Resize\/Move Partition.”<\/p>\n
\"resize<\/p>\n
In the “Move Partition” dialog, select the MSR partition and drag it to the extreme right.<\/p>\n
\"resize<\/p>\n
It should look like the following screenshot. Click OK<\/strong> to continue.<\/p>\n
\"resize<\/p>\n
The unallocated space has been moved next to the EFI partition\u2014i.e., between EFI and MSR.<\/p>\n
\"resize<\/p>\n
Select the EFI System Partition and click “Resize\/Move Partition”.<\/p>\n
\"resize<\/p>\n
You’ll see the “Move and Resize Partition” dialog below.<\/p>\n
\"resize<\/p>\n
Click the drag handle and move it to the right. This extends the EFI partition, wholly occupying the unallocated space next to the partition. Now, the partition is 250 MB<\/strong> in size, but the changes have not yet been applied.<\/p>\n
Click OK to continue.<\/p>\n
\"resize<\/p>\n
On the AOMEI dashboard, you’ll see the “Apply” button indicating pending changes.<\/p>\n
Click Apply<\/strong>.<\/p>\n
\"resize<\/p>\n
AOMEI will summarize the pending operations. Click “Proceed”.<\/p>\n
\"resize<\/p>\n
Click OK with the “Restart into Windows PE mode” option enabled.<\/p>\n
\"resize<\/p>\n
\"resize<\/p>\n
Windows will automatically restart, and the system enters WinPE mode, where AOMEI commits all the pending actions (i.e., Shrinking the C drive and creating the unallocated space before the partition, moving the MSR partition, and resizing the EFI partition).<\/p>\n
\"resize<\/p>\n
\"resize<\/p>\n
\"resize<\/p>\n
Once done, click “Restart Now<\/strong>“.<\/p>\n
The system will reboot into Windows.<\/p>\n
\"resize<\/p>\n
Open Disk Management. You’ll see that the EFI partition has been resized successfully.<\/p>\n
\n
Related articles<\/h3>\n
How to Resize the Recovery Partition in Windows<\/a><\/p>\n
MBR2GPT | Too many MBR partitions found, no room to create EFI system partition<\/a><\/p>\n
How to Move EFI System Partition to Another Drive in Windows 10 or 11<\/a><\/p>\n
How to Fix the EFI Boot Partition\u2019s ID Using DiskPart<\/a><\/p>\n
[Fix] EFI System Partition Appears in Explorer<\/a><\/p>\n
How to Rebuild the EFI Boot Partition, BCD and Boot Files<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"
Summary: This post explains how to increase the size of the EFI partition to 250 MB without using any paid software. The EFI system partition stores the boot configuration database (BCD) and the boot files needed to boot a UEFI system. By default, the Windows setup creates a 100 MB EFI partition, which may be … Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_post_was_ever_published":false},"categories":[6,8,869],"tags":[965],"class_list":["post-78024","post","type-post","status-publish","format-standard","hentry","category-utilities","category-windows-10","category-windows-11","tag-disk-management"],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack-related-posts":[{"id":61178,"url":"https:\/\/www.winhelponline.com\/blog\/0x80070003-0x20008-error-feature-update\/","url_meta":{"origin":78024,"position":0},"title":"0x80070003 – 0x20008 – Windows 10\/11 Feature Update Error","author":"Ramesh","date":"September 4, 2023","format":false,"excerpt":"When you attempt to install a Feature Update, the error code 0x80070003 - 0x20008 may appear. The\u00a0Setupact.log file may show the following contents: Info CONX ConX::Compatibility::CSystemAbstraction::HostIsUEFIFirmware: Host is UEFI. Error CONX ConX::Compatibility::CSystemAbstraction::HostIsUEFIDiskLayout: Failed to retrieve system partition NT path. Error CONX CHostIsUEFICompliantChecker failed. [Failed to check whether host has UEFI\u2026","rel":"","context":"In "Windows 10"","block_context":{"text":"Windows 10","link":"https:\/\/www.winhelponline.com\/blog\/category\/microsoft\/windows\/windows-10\/"},"img":{"alt_text":"efi boot partition - disk management","src":"https:\/\/i0.wp.com\/www.winhelponline.com\/blog\/wp-content\/uploads\/2023\/09\/efi-system-partition-diskmgmt.png?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.winhelponline.com\/blog\/wp-content\/uploads\/2023\/09\/efi-system-partition-diskmgmt.png?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.winhelponline.com\/blog\/wp-content\/uploads\/2023\/09\/efi-system-partition-diskmgmt.png?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.winhelponline.com\/blog\/wp-content\/uploads\/2023\/09\/efi-system-partition-diskmgmt.png?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":32027,"url":"https:\/\/www.winhelponline.com\/blog\/rebuild-efi-partition-bcd-boot-files\/","url_meta":{"origin":78024,"position":1},"title":"How to Rebuild the EFI Boot Partition, BCD and Boot Files","author":"Ramesh","date":"January 17, 2023","format":false,"excerpt":"The EFI boot partition is a FAT32 partition that stores the boot files and the boot configuration data (BCD) to load Windows. Sometimes, the boot partition or the BCD may get corrupted, and the boot files remain unserviceable by the Windows Setup process. In that case, rebuilding the EFI partition\u2026","rel":"","context":"In "Windows 10"","block_context":{"text":"Windows 10","link":"https:\/\/www.winhelponline.com\/blog\/category\/microsoft\/windows\/windows-10\/"},"img":{"alt_text":"EFI partition shows as RAW","src":"https:\/\/i0.wp.com\/www.winhelponline.com\/blog\/wp-content\/uploads\/2023\/01\/efi-raw-diskmgmt.png?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.winhelponline.com\/blog\/wp-content\/uploads\/2023\/01\/efi-raw-diskmgmt.png?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.winhelponline.com\/blog\/wp-content\/uploads\/2023\/01\/efi-raw-diskmgmt.png?resize=525%2C300&ssl=1 1.5x"},"classes":[]},{"id":74926,"url":"https:\/\/www.winhelponline.com\/blog\/reagentc-exe-operation-failed-2\/","url_meta":{"origin":78024,"position":2},"title":"REAGENTC.EXE: Operation failed: Error 2 or Error 3bc3","author":"Ramesh","date":"April 24, 2024","format":false,"excerpt":"When you attempt to enable Windows RE by running the reagentc \/enable command, the following error may be shown: REAGENTC.EXE: Operation failed: 2 REAGENTC.EXE: An error has occurred. (or) REAGENTC.EXE: Operation failed: 3bc3 or REAGENTC.EXE: Unable to update Boot Configuration Data. The ReAgent.log may record the following error: Info [ReAgentc.exe]\u2026","rel":"","context":"In "Windows 10"","block_context":{"text":"Windows 10","link":"https:\/\/www.winhelponline.com\/blog\/category\/microsoft\/windows\/windows-10\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":74860,"url":"https:\/\/www.winhelponline.com\/blog\/create-move-efi-partition-windows\/","url_meta":{"origin":78024,"position":3},"title":"How to Move EFI System Partition to Another Drive in Windows 10 or 11","author":"Ramesh","date":"April 18, 2024","format":false,"excerpt":"The EFI partition is created automatically when you install Windows. However, after adding a second HDD\/SSD and installing Windows on that disk, you may realize that the EFI system partition remains on the old hard disk. You wonder how to move the EFI partition from the old hard drive to\u2026","rel":"","context":"In "Windows 10"","block_context":{"text":"Windows 10","link":"https:\/\/www.winhelponline.com\/blog\/category\/microsoft\/windows\/windows-10\/"},"img":{"alt_text":"EFI boot partition on another disk","src":"https:\/\/i0.wp.com\/www.winhelponline.com\/blog\/wp-content\/uploads\/2024\/04\/move-efi-partition-os-drive.png?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.winhelponline.com\/blog\/wp-content\/uploads\/2024\/04\/move-efi-partition-os-drive.png?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.winhelponline.com\/blog\/wp-content\/uploads\/2024\/04\/move-efi-partition-os-drive.png?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.winhelponline.com\/blog\/wp-content\/uploads\/2024\/04\/move-efi-partition-os-drive.png?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":74838,"url":"https:\/\/www.winhelponline.com\/blog\/fix-efi-boot-partition-guid-set-id\/","url_meta":{"origin":78024,"position":4},"title":"How to Fix the EFI Boot Partition’s ID Using DiskPart","author":"Ramesh","date":"April 17, 2024","format":false,"excerpt":"Each partition type is strictly identified by a GUID number. For example, the data partitions (\"Basic data partition\") are identified by the GUID ebd0a0a2-b9e5-4433-87c0-68b6b72699c7. The EFI partition has the GUID c12a7328-f81f-11d2-ba4b-00a0c93ec93b. However, on some systems, the EFI partition may have an incorrect ID assigned for unknown reasons. As a result,\u2026","rel":"","context":"In "Windows 10"","block_context":{"text":"Windows 10","link":"https:\/\/www.winhelponline.com\/blog\/category\/microsoft\/windows\/windows-10\/"},"img":{"alt_text":"fix EFI partition id using diskpart's set id command.","src":"https:\/\/i0.wp.com\/www.winhelponline.com\/blog\/wp-content\/uploads\/2024\/04\/diskpart-fix-efi-partition-guid.png?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.winhelponline.com\/blog\/wp-content\/uploads\/2024\/04\/diskpart-fix-efi-partition-guid.png?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.winhelponline.com\/blog\/wp-content\/uploads\/2024\/04\/diskpart-fix-efi-partition-guid.png?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.winhelponline.com\/blog\/wp-content\/uploads\/2024\/04\/diskpart-fix-efi-partition-guid.png?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":75307,"url":"https:\/\/www.winhelponline.com\/blog\/bcdboot-failure-initializing-library-system-volume\/","url_meta":{"origin":78024,"position":5},"title":"Bcdboot “Failure when initializing library system volume”","author":"Ramesh","date":"May 28, 2024","format":false,"excerpt":"When you run the Bcdboot command to copy boot files to the EFI system partition, the following error may occur: Failure when initializing library system volume. The output contains the list of Bcdboot command-line arguments. RELATED: How to Rebuild the EFI Boot Partition, BCD and Boot Files Cause The above\u2026","rel":"","context":"In "Windows 10"","block_context":{"text":"Windows 10","link":"https:\/\/www.winhelponline.com\/blog\/category\/microsoft\/windows\/windows-10\/"},"img":{"alt_text":"diskpart - assign efi drive letter","src":"https:\/\/i0.wp.com\/www.winhelponline.com\/blog\/wp-content\/uploads\/2024\/05\/efi-partition-assign-letter.png?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.winhelponline.com\/blog\/wp-content\/uploads\/2024\/05\/efi-partition-assign-letter.png?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.winhelponline.com\/blog\/wp-content\/uploads\/2024\/05\/efi-partition-assign-letter.png?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.winhelponline.com\/blog\/wp-content\/uploads\/2024\/05\/efi-partition-assign-letter.png?resize=700%2C400&ssl=1 2x"},"classes":[]}],"_links":{"self":[{"href":"https:\/\/www.winhelponline.com\/blog\/wp-json\/wp\/v2\/posts\/78024","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.winhelponline.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.winhelponline.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.winhelponline.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.winhelponline.com\/blog\/wp-json\/wp\/v2\/comments?post=78024"}],"version-history":[{"count":0,"href":"https:\/\/www.winhelponline.com\/blog\/wp-json\/wp\/v2\/posts\/78024\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.winhelponline.com\/blog\/wp-json\/wp\/v2\/media?parent=78024"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.winhelponline.com\/blog\/wp-json\/wp\/v2\/categories?post=78024"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.winhelponline.com\/blog\/wp-json\/wp\/v2\/tags?post=78024"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}